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Most people are aware they can claim some medical expenses on their tax return, but many don't keep a running tally because they simply forget or don't think it will add up to worthwhile savings. That's a potentially costly mistake, say tax experts.

"I put it down as being one of the most well-known and least-utilized [tax credits]," says Alan Rowell, tax specialist and president of Hamilton, Ont.-based Accounting Place.

The tax credit applies to any number of medical expenses — including prescription drugs, eyeglasses, health-related home renovations, dental work and even buying gluten-free bread or medical marijuana.

"If you don't start adding them up, you'll never know," said Rowell.

The list of medical expenses eligible for a tax credit is exhaustive, and we have highlighted some the less familiar ones below.

For the 2014 tax year, the government has added two items to the list of eligible medical expenses: the cost of service animals used to help manage severe diabetes and the cost of mental or physical therapy for persons eligible to claim the disability tax credit.

The caveat of claiming any medical expense is that the government automatically deducts the lesser of either $2,171 or three per cent of your net income from a person's total medical expenses. For some, that means the credit might be negligible or even nonexistent, but for others it's definitely worthwhile to make a claim.

Keep receipts

You do need to do some homework, in terms of keeping your medical expense receipts. It's something that is not easy to do over the course of a year unless you make a conscious effort to put the receipts aside, Rowell says.

For those who make the effort, anything over the amount automatically deducted by the Canada Revenue Agency means money in your pocket.

Service dogs can be a tax-deductible medical expense in some cases. (Brian Snyder/Reuters)

​One detail to be aware of is that your medical expenses don't have to fall within the calendar year but can be claimed for any 12-month period that ends in the tax year for which you are filing. So, if you had a number of unclaimed medical expenses over several months in 2013, you can combine them with expenses from 2014 and claim then on your 2014 return as long as they fall within a period of 12 consecutive months.

However, that means you must use the same period when claiming medical expenses for your dependants.

Another time-saver that Rowell recommends is to contact your local drugstore — where you usually get prescriptions — to see if they can provide one single receipt for the whole year, thereby avoiding the hassle of compiling 12-months worth of receipts.

There is also a refundable tax credit for working people on low incomes who have high medical expenses, and a deduction for medical expenses incurred in order to enable a disabled person to work or attend school. The disability supports deduction applies to expenses such as sign-language interpretation services and Braille printers.

Disability tax credit not negligible

Another of the most-often overlooked credits is the disability tax credit — which coincidentally happens to be the most lucrative non-refundable tax credit, worth up to $2,500 in real money depending on the province of the tax filer, with additional amounts of $680 federally and from $181 to $1,030 provincially for a taxpayer with a disabled child under 18.

'We can get into some real money, and people just don't realize it.'— Alan Rowell, Accounting Place

The credit is intended for those with serious and prolonged physical or mental impairments. To be eligible, the disability must markedly or significantly restrict activities of daily living, including walking, eating, speaking or some combination thereof. A physician or licensed practitioner must complete and certify the medical section on form T2201.

Rowell says part of the reason it is often missed is because it is poorly named.

"I think they should call it a restricted quality of life tax credit, because I think that's really what it is," he says.

Knowing what to claim

While most tax software programs do a good job of prompting you about available credits and deductions, they don't necessarily take into account all the specifics of your particular situation. They will ask you about medical expenses, but you still have to know what expenses to claim.

The disability tax credit can be claimed retroactively up to 10 years if a person has been experiencing eligible impairments but has only now applied for the credit. That can add up to a major tax refund.

If medical marijuana is part of your treatment, save your receipts as you may be able to claim the expense. (Jonathan Hayward/Canadian Press)

"We can get into some real money and people just don't realize it," Rowell says.

The credit can also be transferred to a spouse or other family member, he adds.

Rowell recommends a person speak with their doctor if they think they might qualify for the disability tax credit.

"It's one of those things," he says. "If you don't ask, you don't get."

Good advice for anyone looking to reduce the amount of tax they have to pay each year, medical expenses included.

Some eligible medical expenses

It appears the CRA has dealt with every possibility for health care expenses, which has made for a wide range of products and procedures that can be claimed. Some you may know, some you should know and some are downright surprising. Below is a list of some of the treatments, devices and procedures that qualify as medical expenses.

Air conditioner — The lesser of $1,000 and 50 per cent of the amount paid for the air conditioner for an individual with a severe chronic ailment, disease, or disorder — prescription required.

Animals — The purchase, care and maintenance costs of a specially trained animal to help someone who is blind, deaf, has a severe physical impairment, autism, epilepsy or severe diabetes. Expenses for those with diabetes must have been incurred after 2013.

Attendant care expenses — Attendant care expenses are amounts you or your spouse or common-law partner paid for attendant care or care in any of the following places:

Self-contained domestic establishments.

Retirement homes, homes for seniors, or other institutions.

Nursing homes (full-time care).

Special schools, institutions, or other places (providing care or care and training).

Group homes in Canada.

Bathroom aids — To help a person get in or out of a bathtub or shower or to get on or off a toilet — prescription required.

Bone marrow transplant — Reasonable amounts paid to locate a compatible donor to arrange the transplant, including legal fees and insurance premiums, and reasonable travel costs, including board and lodging for the patient, the donor and their respective companions.

Cosmetic surgery — Generally, expenses for purely cosmetic procedures are eligible only if incurred before March 5, 2010. An expense will continue to qualify as a medical expense if it is necessary for medical or reconstructive purposes, such as surgery to address a deformity related to a congenital abnormality, a personal injury resulting from an accident or trauma, or a disfiguring disease.

Furnace — The amount paid for an electric or sealed combustion furnace to replace a furnace that is neither of these, where the replacement is necessary because of a person's severe chronic respiratory ailment or immune system disorder — prescription required.

Gluten-free food — People with celiac disease who have been prescribed a gluten-free diet by a medical practitioner can claim the difference in cost between gluten-free and non-gluten-free products as a medical expense.

Hospitals services — Public or private, that are designated as hospitals by the province, territory or jurisdiction where they are located.

In vitro fertility program — Paid to a medical practitioner or a public or licensed private hospital, not including donations to a sperm bank.

Medicinal marijuana — The cost of medical marijuana or marijuana seeds can be claimed as a medical expense as long as the individual is authorized to possess the drug and the marijuana was purchased from Health Canada or someone licensed to produce medical marijuana. This does not include costs associated with the growing of marijuana.

Orthodontic work including braces — Expenses for purely cosmetic procedures are not eligible.

Scooter — The amount paid for a scooter that is used in place of a wheelchair.

Travel expenses — If medical treatment is not available to you within 40 kilometres from your locality, you may be able to claim the cost of public transportation (for example, taxi, bus, or train) to get the treatment somewhere else. However, if public transportation is not readily available, you can claim vehicle expenses to get medical treatment. In addition, if you have to travel more than 80 kilometres (one way) from your locality for medical treatment, you may be able to claim the cost of your meals and accommodations. You can also claim travel expenses for someone to accompany you if a medical practitioner certifies in writing that you are unable to travel without assistance.

Walking aids — The amount paid for devices designed exclusively to help a person who has a mobility impairment to walk — prescription required.

Water filter, cleaner, or purifier — The amount paid for a person to cope with or overcome a severe chronic respiratory ailment, or severe chronic immune system disregulation — prescription required.

Whirlpool bath treatments — The amount paid to a medical practitioner. A hot tub that you install in your home, even if prescribed by a medical practitioner, is not eligible.

Wigs — The amount paid for a person who has suffered abnormal hair loss due to a disease, accident, or medical treatment — prescription required.

The full list of eligible expenses can be found at the CRA website. It's user-friendly and arranged alphabetically.

Expenses that do not qualify

There are a number of expenses that are commonly claimed as medical expenses but don't qualify. Here is the complete list of non-eligible expenses list from the CRA.

Athletic or fitness club fees.

Birth control devices (non-prescription).

Blood pressure monitors.

Cosmetic surgery — Expenses for purely cosmetic procedures, including any related services and other expenses such as travel, incurred after March 4, 2010, cannot be claimed as medical expenses. Both surgical and non-surgical procedures purely aimed at enhancing one's appearance are not eligible.

There are a number of expenses that people commonly try to claim as medical expenses but which don't qualify.

Liposuction.

Hair replacement procedures.

Botulinum injections.

Teeth whitening.

An expense, including those identified above, may qualify as a medical expense if it is necessary for medical or reconstructive purposes, such as surgery to address a deformity related to a congenital abnormality, a personal injury resulting from an accident or trauma, or a disfiguring disease.

Diaper services.

Health plan premiums paid by an employer and not included in your income.

Health programs.

Organic food.

Over-the-counter medications.

Vitamins, and supplements, even if prescribed by a medical practitioner.

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